Motor power device and motor including the same

Abstract

A motor power device includes a power circuit having a low voltage part that receives and converts AC power and outputs DC voltage, wherein a first power for a motor drive coil and a second power for a control circuit controlling the motor drive coil are supplied by using the DC voltage outputted from the power circuit, and a motor may include the motor power device. In one aspect, a motor power device is provided that may supply a DC voltage by using an AC power regardless of the magnitude of the AC power. In another aspect, a power circuit may output suitable DC voltage with less cost even though the magnitude of the AC power has changed. In yet another aspect, a motor power device is provided that may supply power for driving a motor drive coil and a power for a control circuit controlling the motor drive coil using one power circuit.

1 . A motor power device comprising:
 a power circuit comprising a low voltage part that receives and converts AC power to output low DC voltage,   wherein a first power for a motor drive coil and a second power for a control circuit controlling the motor drive coil are supplied by using the low DC voltage outputted from the power circuit.   
   
   
       2 . The motor power device of  claim 1 , wherein the low voltage part comprises a capacitor that converts the inputted AC power based on a capacitive value of the capacitor. 
   
   
       3 . The motor power device of  claim 2 , wherein the capacitive value of the capacitor is selected based on a magnitude of the AC power. 
   
   
       4 . The motor power device of  claim 2 , wherein the capacitor is a film capacitor. 
   
   
       5 . The motor power device of  claim 2 , wherein the capacitor is a film capacitor made of polypropylene. 
   
   
       6 . The motor power device of  claim 1 , wherein the power circuit further comprises a protection circuit connected between an AC power terminal and the low voltage part in serial to protect the power circuit against a malfunction of the low voltage part. 
   
   
       7 . The motor power device of  claim 6 , wherein the protection circuit comprises a fuse configured as a circuit beaker. 
   
   
       8 . The motor power device of  claim 1 , wherein the power circuit further comprises a rectifier circuit connected to a rear terminal of the low voltage part to rectify the DC voltage outputted from the low voltage part. 
   
   
       9 . The motor power device of  claim 8 , wherein the power circuit further comprises a smoothing circuit connected to the rectifier circuit in parallel to smooth the DC voltage rectified at the rectifier circuit. 
   
   
       10 . The motor power device of  claim 8 , wherein the power circuit further comprises a voltage drop part connected to an output terminal of the rectifier circuit to lower a DC voltage value outputted at the rectifier circuit, wherein the DC voltage outputted at the rectifier circuit is configured as a second power for a control circuit. 
   
   
       11 . The motor power device of  claim 10 , wherein the voltage drop part is configured as at least two resistors in serial. 
   
   
       12 . The motor power device of  claim 10 , wherein the power circuit further comprises a zener diode that regulates and maintains the DC voltage outputted at the voltage drop part. 
   
   
       13 . The motor power device of  claim 12 , further comprising a resistor connected to the zener diode in serial to protect the zener diode from overcurrents. 
   
   
       14 . The motor power device of  claim 1 , wherein the motor drive coil comprises a first coil and a second coil, wherein the control circuit further comprises,
 a HIC (Hall Integrated Circuit) that senses a rotation of a motor to output a square wave output signal,   a signal inverting switch that inverts the output signal of the HIC,   a first coil control switch connected to the first coil in serial to switch the first coil on and off based on the output signal outputted at the first coil, and   a second coil control switch connected to the second coil in serial to switch the second coil on and off based on the output signal inverted at the signal inverting switch.   
   
   
       15 . The motor power device of  claim 14 , wherein the control circuit further comprises switch protection circuits connected to the first coil control switch and the second coil control switch, respectively, to remove noise generated when the first and second coil control switches are switched on and off. 
   
   
       16 . The motor power device of  claim 15 , wherein the switch protection circuit is a film capacitor made of polypropylene. 
   
   
       17 . A motor power device comprising:
 a motor power circuit comprising a first low voltage part that receives and converts AC power to output a DC voltage, and   a control power circuit comprising a second low voltage part that receives and converts the AC power to output a low DC voltage,   wherein a first power for a motor drive coil is supplied by using the DC voltage outputted at the motor power circuit and a second power for controlling the motor drive coil is supplied by the low DC voltage outputted at the control power circuit.   
   
   
       18 . The motor power device of  claim 17 , wherein the first and second low voltage parts comprise capacitors, respectively, that converts the AC power based on the capacitive value of the capacitor. 
   
   
       19 . The motor power device of  claim 18 , wherein the capacitive value of the capacitor is selected based on a magnitude of the AC power. 
   
   
       20 . The motor power device of  claim 18 , wherein the capacitor is a film capacitor. 
   
   
       21 . The motor power device of  claim 18 , wherein the capacitor is a film capacitor made of polypropylene. 
   
   
       22 . The motor power device of  claim 17 , further comprising a protection circuit connected to each front terminal of the first and second low voltage part to protect the motor power circuit and the control power circuit against is a malfunction of the first and second low voltage part. 
   
   
       23 . The motor power device of  claim 22 , wherein the protection circuit comprises a fuse as a circuit breaker. 
   
   
       24 . The motor power device of  claim 17 , wherein the motor power circuit further comprises a rectifier circuit connected to a rear terminal of the first low voltage part to rectify the DC voltage outputted at the first low voltage part. 
   
   
       25 . The motor power device of  claim 24 , further comprising a smoothing circuit connected to the rectifier circuit in parallel to smooth the DC circuit rectified at the rectifier circuit. 
   
   
       26 . The motor power device of  claim 17 , wherein the control power circuit further comprises a rectifier circuit connected to the motor drive coil in parallel to receive and rectify the DC voltage outputted at the second low voltage part, wherein the DC voltage outputted at the rectifier circuit is configured as a second power for the control circuit. 
   
   
       27 . The motor power device of  claim 26 , wherein the rectifier circuit is configured as at least two rectifier diodes in serial. 
   
   
       28 . The motor power device of  claim 26 , wherein the control power circuit further comprises a zener diode that regulates and maintains the DC voltage outputted at the rectifier circuit. 
   
   
       29 . The motor power device of  claim 28 , further comprising a resistor connected to the zener diode in serial to protect the zener diode from overcurrents. 
   
   
       30 . The motor power device of  claim 17 , wherein the motor drive coil comprises a first coil and a second coil, wherein the control circuit further comprises,
 a HIC (Hall Integrated Circuit) that senses a rotation of a motor to output a square wave output signal,   a signal inverting switch that inverts the output signal of the HIC,   a first coil control switch connected to the first coil in serial to switch the first coil on and off based on the output signal outputted at the first coil, and   a second coil control switch connected to the second coil in serial to switch the second coil on and off based on the output signal inverted at the signal inverting switch.   
   
   
       31 . The motor power device of  claim 30 , wherein the control circuit further comprises switch protection circuits connected to the first coil control switch and the second coil control switch, respectively, to remove noise generated when the first and second coil control switches are switched on and off. 
   
   
       32 . The motor power device of  claim 31 , wherein the switch protection circuit is a film capacitor made of polypropylene. 
   
   
       33 . A motor comprising:
 a bracket that defines an exterior of the motor;   a PCB (printed circuit board) held within the bracket and having a circuit pattern and various elements mounted thereon;   a stator provided on the PCB;   a rotor provided within the stator to rotate;   a shaft that rotate together with the rotor to transmit a rotational force of the rotor outside; and   a motor power device comprising a power circuit comprising a low voltage part that receives and converts AC power and outputs DC voltage, wherein a first power for a motor drive coil and a second power for a control circuit controlling the motor drive coil are supplied by using the DC voltage outputted from the power circuit.   
   
   
       34 . A motor comprising:
 a bracket that defines an exterior of the motor;   a PCB (printed circuit board) held within the bracket and having an circuit pattern and various elements mounted thereon;   a stator provided on the PCB;   a rotor provided within the stator that rotates;   a shaft that rotate together with the rotor to transmit a rotational force of the rotor outside; and   a motor power device comprising a motor power circuit comprising a first low voltage part that receives and converts AC power to output DC voltage, and a control power circuit comprising a second low voltage part that receives and converts the AC power to output low DC voltage, wherein a first power for a motor drive coil is supplied by using the DC voltage outputted at the motor power circuit and a second power for controlling the motor drive coil is supplied by the low DC voltage outputted at the control power circuit.